Crank-case pan for engines.



W. A. FREDERICK.

CRANK CASE PAN FOR ENGINES.

APPLICATION FILED APR.8. |918.

1,281,548., Patented Oct. 15, 1918` O VIHHII..

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WALTER A. FREEEBICK, OF DETROIT, MICHGAN, ASSIGNGR T0 CNTNNTAL MIUTOBJS CBPB'LTON, F DETROIT, ItCl-IGAN, A COBGRATIGN UF VRGNA.

@RANK-@ASE PAN FOR ENGNES.

Specification of Letters Patent.

Patented @ein i5, 19H3@ Application led April 8, wie. Serial No. 227,220.

To all whom t may concern:

Be it known that l, WALTER A.. Fnnnnurcn, a citien of the United States ofi America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful improvements in Crank-Case Pans for Engines, of which the :following is a specilication, reference being had therein to the accompanying drawings.

ln the manufacture of oil pans for engines, particularly of the internal combustion type having splash, dipper or wipe systems of lubrication, it has been the practice to make a pan of pressed sheet metal and place in the same a tray or superposed lubricant holding member positioned so that the connecting rods of an engine or parts thereof may dip or wipe quantities of lubricant from the tray or member, and thus insure proper lubrication of bearings and parte of a crank shaft and connecting rods. ln mounting the tray or member in the pan spot welding and soldering; have been resorted to so as to secure the tray relative to the pan, but such tastening means has proved impractical for the following reasons,

First, on account of the size and shape of a pan and its tray or superposed member, it is practically impossible to shape the edges of the tray so that it will accurately ht the walls of the pan, and when spot welding and soldering are resorted to as a fastening means, interstices or spaces are'left causing a leakage between the tray and its pan. Then again, it is impossible to form the edges or a tray so that there will always be a perfect almttinp,n relation between the tray and its pan conducive to spot weldin". V ery often it is necessary to spring the edge ci the tray to cause it to properly abut the wall of the pan and it has been found that alter spot weldinga vthe juncture is not durable, eventually causing leakage.

Second, with the tray or superposed menen ber spot welded and soldered in the pan, it was practically impossible to clean the pan and remove sediment from the cylinder lubrieating oil. rl`his, together with leakage, poor.

fitting, imperfections of manufacture, and skilled labor required 'to make the* pan as near perfect as possible, have been a serious drawback in the production of engine crank cases, so l now aim to rectify such conditions by a simple, durable and inexpensive pan that ulls all requirements in connection with an engine crank cases My invention will be hereinafter described and then claimed, and reference will now be had to the drawings, wherein- Figure l is a plan or"k the pan and its tray;

Fig. 2 is a longitudinal sectional view of the same; and

Fig. 3 is an enlarged detail sectional view of the marginal edges o the pan and tray.

ln the drawing, the reference numeral l denotes a pan having the bottom thereof provided with an opening 2 and a lubricant delector 3 adjacent said opening. The side and end walls l of the pan are provided with lateral langes 5 and these flanges are apertured, as at 6.

llt is preferable to form 'the l from sheet metal pressed to proper shape so that it may be connected by screw bolts l or other fastening means to the lower edges of a crank case 8, said screw bolts extending through the apertures ii of the marginal flanges 5.

ln the pan l is placed a tray or superposed member 9 having a plurality of transversely disposed clipper troughs l0, correspending in number to the connecting` rods of an engine. The tray 9 is of less depth than the pan l, thus providing' clearance for the derlector 3 and a space between the bottom of the tray and the bottom of the pan. The tray 9 has a central opening surrounded by an upstanding ange or sleeve ll, and the inclined walls l2 of the tray, at the ends thereof, are provided with openings 13 having the upper edges thereof formed vwith entstand;V ing anges lei. Besides these openings, one oi the side inclined walls of the tray has a large opening; or cut away portion l5 with the lower edge thereof provided with an upstandingr flange lr6, the openings 13 and l5 establishing communication between the interior of the tray and the interior of the pan.

llt is therefore possible for an excess amount ot lubricant within the tray 9 to lenter the pan l and be removed therefrom by a pump forming; part of the lubricant circulatine' system (not shown).

' Similar to the lpan l, the tray 9 is pref-- erably pressed from sheet metal by the use of suitable dies which provide the depressions constituting dipper troughs adapted for holding suicient lubricant for connecting rods or parts thereof, as the lower ends of said rods dip into the troughs during the operation of an engine.

The inclined walls 12 of the tray 9 are formed with lateral marginal flanges 17 adapted to be held by the screw bolts 7 between the flanges 5 of the pan 1 and the lower edges of the crank case 8, and to prevent leakage at the flanges 5 and 17, a compressible gasket 18 is placed at the outer edges of the flange 17, between the flanges 5 and the lower edges of the crank case. The compressible gasket 18 is of greater thickness than the flanges 17 and said gasket is apertured to provide clearance for the screw bolts 7, so that said screw bolts may be tightened to compress the gasket 18 between the flanges 5 at the lower edge of the crank case, and thus establish a positive and non-leakable connection between the pan l andthe crank case.

Since the tray 9 is stamped and' pressed' from sheet metal it is possible to have the dipper troughs 10 integral therewith, which is an advantage, but even then on account of the large size of the tray and pan, it is not always possible to have the entire flange area of each in a-horizontal plane, This is due to the gage of the metal, handling and other causes, but it is always possible to have the tray9 of such 'a size that it will fit within the pan. By reference to Fig. Q, it will be observed that the upper inclined edges or walls of the tray fit against the inclined walls l of the pan, adjacent the flanges 5, and by so nesting the tray and pan the former is always correctly positioned relative to the latter. New, when the flanges 5 of the pan are connected to the lower edges of the crank case by the screw bolts 7, all unevenness or inequalities in the flanges are drawn out and both receptacles posi* assiste tively clamped against the crank case. It is therefore not necessary to resort to spot welding or soldering to hold the tray relative to the pan, nor to use such fastening means to establish a non-leakable connection, since it is practically impossible for lubricant to pass between the flanges 5 and 17, and more particularly the gasket 1S which is compressed between the flanges 5 and the crank case. This manner of connecting the pan and tray to the crank ease permits of the same being easily removed and both thoroughly cleaned of any sediment` or other matter that may accumulate within the pan or tray. p

F rom the foregoing it is thought that the advantages of' my construction will lbe apparent without y further description, and while in the drawing there is illustrated a preferred embodiment of my invention, it is to be understood that the shape and size of the pan and tra-y may be varied and that other changes may be resorted to without departing from the scope of the invention as defined in the appended claim.

What 1 claim is The combination of a crank case, a pan having marginal flanges connected to said.`

crank case, a tray in said pan having marginal flanges between the flanges of said pan and said crank case, and a eompressible gashet between the flanges of said pan and said crank case, said gasket being at the outer edges of the flanges of said pan and in a plane with the ange of said tray.

1n testimony whereof l afhx my signature in the presence of two witnesses.

WVALTER A. FREDERCK. Q Witnesses:

W. Anania@i D. ANDREWS. 

